ĐỒNG HỒ ĐO NHIỆT ĐỘ WIKA 74

Standard version
Measuring principle
Inert gas expansion system
Nominal size in mm
100
Process connection
Clamp connection
Threaded connection per DIN 11851
VARIVENT® connection for pipes DN 40 to DN 125 and 1 ½" to 4", PN 25
NEUMO BioControl®
Size 50 (mounting diameter 50 mm) for pipes DN 25 to DN 100, PN 16
Size 65 (mounting diameter 68 mm) for pipes DN 40 toDN 100, PN 16
Aseptic threaded pipe connection DIN 11864-1 form A
Aseptic threaded pipe connection DIN 11864-2 form A
Aseptic threaded pipe connection DIN 11864-3 form A

Model overview

Model NS Version

A74.100 100 Back mount (axial)

R74.100 100 Lower mount (radial)
Indication accuracy
±1 °C within measuring range, at 23 °C ±10 °C
Working range
Normal (1 year): Measuring range (EN 13190)
Short time (24 h max.): Scale range (EN 13190)
Rated operating ranges and conditions
EN 13190
Temperature sensor
Wetted parts stainless steel 1.4435
Diameter 21 mm
Length 30 mm
Surface of the wetted parts
Ra ≤ 0.8 µm
Case
Stainless steel 1.4301
Ring
Bayonet ring bezel, stainless steel 1.4301
Stem, process connection
Stainless steel 1.4435
Dial
Aluminium, white, black lettering

Window
Laminated safety glass
Pointer
Aluminium, black, micro adjustment
Temperature limits for storage and transport
-50 … +70 °C without liquid damping
-40 … +70 °C with liquid damping
0 … +60 °C with food-compatible liquid damping
Permissible ambient temperature
-40 … +60 °C without/with liquid damping
0 … +60 °C with food-compatible liquid damping
Permissible operating pressure at the temperature sensor
max. 25 bar, static
Ingress protection
IP65 per IEC/EN 60529
Options
* Scale range °F, °C/°F (dual scale)
* Other process connection
*  Surface of the wetted parts
- Ra ≤ 0.4 µm
- Electropolished Ra ≤ 0.4 µm
- Polished and electropolished Ra ≤ 0.25 µm
* Case with food-compatible liquid damping (medicinal white mineral oil KN 92)
* Window from polycarbonate
* Ingress protection IP66
* Thermometer with switch contacts (data sheet TV 27.02)
* Version per ATEX